What can dentists do to protect themselves and patients?

Why dentistry is a risk branch?
The COVID-19 virus was recently identified in saliva of infected patients. Saliva can have a pivotal role in the human-to-human transmission. Dentists and other healthcare professionals that perform aerosol-generating procedures may be unknowingly providing direct care for infected but not yet diagnosed COVID-19 patients, or those considered to be suspected cases for surveillance.

Hand hygiene has been considered the most critical measure for reducing the risk of transmitting microorganism to patients (Larson et al. 2000). SARS-CoV-2 can persist on surfaces for a few hours or up to several days, depending on the type of surface, the temperature or the humidity of the environment (WHO 2020c). This reinforces the need for good hand hygiene and the importance of thorough disinfection of all surfaces within dental clinics. Every surface in the waiting room must be considered at risk;

The use of personal protective equipment (including masks, gloves, gowns and goggles or face shields) is recommended to protect skin and mucosa from (potentially) infected blood or secretions. As respiratory droplets are the main route of SARS-CoV-2 transmission, particulate respirators (e.g., N-95 masks authenticated by the National Institute for Occupational Safety and Health or FFP2-standard masks set by the European Union) are recommended for the routine dental practice.

The need to stop and the need for clear guidelines
On 15 March 2020, the New York Times published an article entitled “The Workers Who Face the Greatest Coronavirus Risk”, where an impressive schematic figure described that dentists are the workers most exposed to the risk of being affected by COVID-19.

dental extraoral aerosol suction system is designed for hospital dental clinic, a extraoral dental suction device configuration used aerosol precision higher HEAP filter and sterilization system, and can quickly filter the patients in the clinic process of droplet, aerosol, bacteria.

The difference bettween RD50 and RD80 Ruiwan dental aerosol suction unit

Ruiwan developed an dental oral aerosol suction equipment necessary for dental clinics – off mouth aerosol suction extractor RD50 and RD80 effectively concentrated oral diagnosis and treatment process with bacteria aerosols, through the original high-efficiency filter layer can effectively absorb water vapor, equipping HEPA effective filter 99.99% droplets, aerosols, so that the air continues to fresh, clean, improve the cleanliness of the diagnosis and treatment environment, reduce cross-infection, to achieve the purpose of anti-infection.

RD50 Aerosol Suction unit use 3 layer filtration + 1 UVC lamp
It is made up of 1 piece of washable primary effective cotton and 1 piece of Water vapor absorbing filter and 1 piece of H13 HEPA.The filtered gas will be sterilized.

RD80 Aerosol Suction unit use 4 layer filtration + 2 UVC lamp
It is made up of 1 piece of washable primary effective cotton and 1 piece of Water vapor absorbing filter and 1 piece of H13 HEPA and 1 piece of Active carbon.
The filtered gas will be sterilized.

Power: RD50(180W) RD80(220W)
Air Flow Rate:RD50(310 m3/h) RD80(340 m3/h)
Filters layer:RD50(3 layer + 1Pc UVC Lamp) RD80(4 layer + 2Pcs UVC Lamps)
Size:RD50(400x255x545mm) RD80(400x255x595mm)
CB:RD50(0.157) RD80(0.166)
N.W:RD50(21kg) RD80(24kg)
Volumetric Weight:RD50(31.5kg) RD80(33kg)

2020 NEW RUIWAN RD50 External Oral Aerosol Suction System Advantages

Off mouth External aerosol suction unit RD50
Oral therapy is prone to aerosol propagation because of its treatment space and the particularity of the equipment. First, dental treatment with high-speed turbo cell phone, ultrasonic cleaning machine, ultrasonic bone knife, three-use gun and other water mist mixed with the patient’s blood and saliva, easy to creat aerosols, pollution of the surrounding air and object surface; Secondly, it is easy to cause patients to cough or even vomit during oral treatment, which is also one of the risk factors for aerosols. Bacteria and viruses are known to be transmitted by aerosols.

RUIWAN Dental Clinic External Oral Aerosol Suction Unit Lab Air Cleaning Machine RD50
RUIWAN Dental Clinic External Oral Aerosol Suction Unit Lab Air Cleaning Machine RD50

AITI Vrious
The situation of the epidemic has slowed down, oral clinics around the beginning of the resumption of re-work, but because of the special nature of oral treatment, dentists to patients in the course of treatment will produce a large number of droplets and aerosols, which will cause the spread of viruses and bacteria, seriously affecting the health of doctors and patients.

Noise:<52 db
Voltage:AC110V / 220V
Filtration Effect:0.3 μm 99.97%
Size:400x255x485 mm
Air Flow Rate:235 m3 / h
Diameter of Flange:75 mm
N.W:23 kg
Filter Elements:3 layers
Certificate:CE , PONY, ISO

Two types of dental specialties rely heavily on the skills

Dental technicians manufacture dental prosthetics including bridges, crowns, and dentures. They construct these devices based on impressions dentists and dental hygienists take of patients’ teeth. Dental technicians also follow dentists’ written and oral instructions. They have no direct contact with patients themselves.

Areas of specialization include orthodontic appliances, crowns, and bridges, complete dentures, partial dentures, or ceramics. In the Dental career industry, Dental technicians are also called dental laboratory technicians.


Two types of dental specialties rely heavily on the skills of a dental laboratory technician:
Restorative dentistry or prosthodontics is used when the patient loses a part or the entire tooth/teeth due to the decay, disease, illness or accident, and the tooth/teeth must be replaced to maintain normal fit, form and function.
Orthodontics is provided when the tooth/teeth must be moved or stabilized to optimize function, esthetics or to prevent painful dysfunction.
Dental laboratory technology specialties include:

Crown and bridge
Partial dentures

The changes that affect modern dental laboratory technology are:
Advancements in material sciences, technologies and manufacturing systems
New legislations and regulations
Health care and education
Aging populations
Changing practice models and emerging team-based care systems
Global economies and market adjustments
Due to a shortage of technicians that is already affecting the field, it is certain that there is and will be a high demand for experienced dental technicians who can handle the needs of an ever-increasing number of dentists and their patients.

Technicians generally work independently. Because each job in a laboratory is different, the work is diverse and interesting. It is not strenuous work, but it does require close attention to detail. Dental laboratories are generally pleasant places in which to work, although there is sometimes pressure when deadlines must be met.

Earnings and Benefits
Salaries vary depending on technicians’ experience and area of specialization. Trainees in dental laboratories average only slightly above the minimum wage. However, earnings in this field increase greatly with experience. The median salary for dental technicians was $14.93 per hour in May 2004, according to the Bureau of Labor Statistics. Self-employed technicians can earn more.

If you are have any problem in choosing dental lab equipment such as dental lab denture injection system and dental lab amalgamator, you can feel free to contact our customer service.

​The CNC Applications of Laser Cutting Machine

The CNC Applications of Laser Cutting Machine

Laser is the use of light, heating and discharge and other means to stimulate the specific material, and in the role of the resonant cavity, so that the material inside the occurrence of stimulated emission of radiation caused by a special light. 


These advantages of laser cutting machine in food processing is very practical value. For example, using a laser to cut noodles, bread, fish, meat, bone, vegetables and fruits, the section will be more smooth, and shape. Can also be cut out of a special shape, as a new product modeling. Cut the food with a laser cutter, knife is any extraordinary chefs are not comparable, especially in large quantities of practical cutting.  

Because the laser cutter is a photon as the cutting edge, can be very sharp to cut off the organic molecules. Protein molecules are very large, with a laser cutter cut, will help digestion. With laser cutter cell membrane, nucleus and cell interstitial incision, to release the organizational structure of nutritional and functional components.

At present, the laser cutting machine made with nema 42 stepper motor has industrial and medical products, with a microcomputer to control the cutting speed and cutting line. If the installation to the food processing production line, can replace or partially replace the knife surface, swell mix tools, saw blade and drill bit can easily change some food processing features and the development of a new product by its characteristics. Such as: fresh pork, beef, chicken and seafood cut with a laser cutter, bone, skin and fiber together cut off, leaving no broken broken bone end, and less hemorrhage.

FAQ of stepper motor – what size stepper motors do I need

If I use a Porter Cable 3-3/4 router motor what size stepper motors do I need?
You can use the standard electronics combo:


. The size of the stepping motors are generally sized with the overall machine structural weight, inertia of parts, the type of mechanical parts used to move the axes, and actually, less by the router which is more connect to how the machine is controlled.

stepper motor runs smooth then rough for a moment then smooth, etc. Does this at all steps, and connected motors?
This sounds like it could be a loose wire, or poor connection with the motor wires. Make sure all wires that are to be connected to each other are soldered and use a lineman’s splice when putting the wires together. Also, make sure that the wires going into the driver is securely fastened.

If this is an issue where the motors have run well for a long time then just started to show this performance issue, then make sure that there are no wire ties or other binding method that is chaffing the wires. This would make the motors run oddly at certain travel positions where the chafing has caused a short with the wires.

If this is an issue where you don’t have the motor plugged in at all and are just trying to turn it by hand and this phenomenon is occuring, then make sure all of the wires are not touching each other. When wires are touching each other and you are trying to spin the shaft by hand, the motor will feed current back into the motor making it difficult to turn.

What is each axis’ resolution for the blueChick in mm or µm?
The resolution for any of our machines is based on the driver microsetting setting and the machanical parts used for each axis.

For example:
The blueChick uses 9 tooth drive sprockets for the x and y axes.
To determine resolution use this formula:
Resolution = steps / inch or the travel in steps for one revolution of the drive sprocket
Steps = (motor steps) * (driver microsteps) or natural motor steps * microstepping setting on the driver
Inches = t(ooth coun)t *( tooth pitch) or the number of teeth for the drive sprocket

Resolution = ((motor steps) * (microsteps)) / (teeth * pitch)
In this example, the microsteps is 16 and the pitch is .25 inches
= (200 * 16) / (9 * .25″)
= 3200 / 2.25″
= 1422.222 steps per inch

For the z axis of the blueChick, the resolution is typically based on 4 micro steps and the travel for one turn of the motor is 1/2″. Therefore:
Resolution = (200 * 4) / .5″
= 800 / .5″
= 1600 steps per inch

If you have any problem in choosing nema 6 –nema 42 stepper motor,you can ask us for help.

How to Choose Dental Endo Obturation System

Endodontics remains an industry leader in cutting edge endo obturation techniques and materials. Our endodontic obturation systems are unmatched in quality and ease of use. We offer a complete line of advanced filling materials, sealers and equipment for all obturation techniques. Our cordless product options provide the freedom of movement to perform endodontic procedures anywhere without restrictions. To ensure every fill is accomplished predictably, efficiently and accurately, dental professionals count on dentalsalemall.com.

How many Endodonticobturation systems and techniques should a general dentist have at his or her immediate disposal? Are there teeth that might be amenable to an obturation technique in one canal and yet another technique in a different canal? Are either of these questions affected by whether treatment is rendered in one or two visits? This two-part column will discuss these questions and related ones in a clinically relevant manner.

COXO Endo Cordless C-Fill Obturation Gun+ Pen

FIRST, the quality and efficiency of obturation is directly related to the canal shaping. Canal shaping, if performed correctly, optimizes irrigation and obturation hydraulics. Ideal irrigation, as a result of canal shaping, is made possible in part by attainment of canal patency, the desired continuously tapered final prepared canal shape, prevention of iatrogenic events, “deep body” shape, as well as use of the correct irrigant solution concentration, application, volume, and activation.

SECOND, visualizing the canal and having tactile control over enlargement is vital in order to prevent iatrogenic obturation issues (short or long obturations), and yet to provide a three dimensional obturation that fulfills the goals of treatment. The optimal instrument for obtaining visual and tactile control over the endodontic access is the surgical operating microscope (Global Surgical, St. Louis). Another excellent option, in the absence of or in addition to the SOM is the use of the loupes such as the Class IV 4.8X HiRes Plus loupes by Orascoptic (Middleton, Wis.).

THIRD, obturation quality depends on attainment of the correct working length. Determination of an accurate working length is an absolutely vital requirement for the highest quality treatment. While opinions among clinicians differ slightly, the minor constriction of the apical foramen (MC) is the natural termination point for endodontic cleaning, shaping, and obturation procedures.

FOURTH, the significance of optimizing the size of the apical preparation cannot be overemphasized. The endodontic literature states that the larger the master apical diameter, the cleaner the canal preparation that results. In essence, apically, a No. 50 master apical diameter is cleaner than a No. 30 master apical diameter, etc. One additional benefit of larger apical diameters is that cone and obturator fit for warm obturation techniques are made simple relative to smaller canals.

If you have any problem in choosing endo equipment such as endo motor with apex locator, please feel free to contact us. Thanks

The guide to choose dental xray sensor online

The decision to implement digital sensors in the dental office is significant. Electronic health records can simplify treatment planning, documentation, and communication, among many other facets of patient care. The decision to go “paperless” often transitions the dental team to implementing an imaging system that facilitates electronic image capture and archiving, which provides many benefits for both patients and practitioners. Digital dental X-rays sensor can reduce radiation dose from 40% to 60% compared to traditional film.1 The transition to digital imaging, however, can be challenging. Understanding how the images will be captured and for what purpose can assist dental professionals in their decision-making process.

This table provides key insights into the digital sensor selection process, which includes a discussion of the benefits of imaging derived from photostimulable phosphor plate (PSP) images vs those captured from a charge-coupled device (CCD) or from complementary metal oxide semiconductors (CMOS). A variety of factors need to be considered when choosing digital sensors. Resolution of the image is important, as the ability of the sensor to capture fine detail of hard and soft tissue is key. How the images will be captured is another important consideration. In a pediatric practice, for example, it may be paramount to have a flexible receptor in small sizes. While sensors with flexibility can be helpful, over time a PSP receptor may degrade and produce images with artifacts, requiring periodic replacement. Sensor size is an essential component to consider, as well. Patient comfort is dramatically affected by the rigidity, size, shape, and bulk (compared to film) of intraoral sensors. Rounded corners enhance patient comfort but slightly reduce the area captured in those corners. A larger sensor may facilitate capture of bone levels, but cover more of the arch in bitewing, as well as periapical X-rays.

GXS-700_patient_038The use of extension cone paralleling (XCP) devices is helpful in sensor positioning, and greatly reduces the number of retakes needed in a full mouth series, bitewing radiographs, or individual periapical poratable dental X-rays. When rectangular collimation is used in combination with digital intraoral sensors, the XCP holders assist practitioners in achieving paralleling techniques—minimizing fogging and further reducing radiation exposure up to five times that of film.1 Patients truly appreciate the efforts of dental teams in dose reduction. They also better understand dental concerns when it is possible to view enlarged images on a computer monitor. The interface between practice management software and image archiving systems should be as seamless as possible. Does a cordless sensor fit the bill, or will it be too easy to lose? Will the sensor hold up under heavy use (or will it be accidentally dropped)? Sturdiness of the sensor housing and electronics also factor into the decision-making process.